1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8ae891a8f7915f7c8dbd579ef3ff00648f17670aa9c8d16a28cda352068a988. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a180d10-617a-4ccd-8f59-3154ef419040.json and https://artists.proofprofile.net/proofs/artist/6a180d10-617a-4ccd-8f59-3154ef419040.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3935e644cd088a99cb2832d691850a9689a109ddd2597a423995fc1e7321ad14. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMEU32114679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e42fbd7bb67b2da29682b25693f9324eaf170c995d4f639a8600fec43896f4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMEU32114680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6744418ec762883ae4824b357b3fa5dec3ff7bd3cf4624a041fcd1d08db4686a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMEU32114681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba3047cbf54d5512377d378c745efdd2130283e4df6e9411f3711890baadc50. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMEU32114682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dc7c2970fc6bfe922db58d7444fa2c0047801933c305d2ef1e1933c4ede066. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMEU32114683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed7c06948ab681c06991427635d93d06531ddde270416758e732dab0baa4a29. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMEU32114684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3f51e207b0b972f52505eadfbb15f8b8c8076f94fc45228754e22a6bac2039. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMEU32114685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fb99d1b2358a84d47c54b73d0b7ea314eb09e0ff3e6d643082290c65416523. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMEU32114686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff886af2db131f89b60533b0c4e5ca3e165f1b8e9650abd549d7b739c4986638. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMEU32114687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167f49a8d762bcbb158961a921a8fb80d015d5845c0955f1eef6c3fa945324d0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMEU32114688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff886af2db131f89b60533b0c4e5ca3e165f1b8e9650abd549d7b739c4986638. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMEU32114687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3f51e207b0b972f52505eadfbb15f8b8c8076f94fc45228754e22a6bac2039. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMEU32114685.